Figure out how much airflow you want. If you have too much, it can send more vapor than you bargained for into your lungs, and then you're liable to choke. Also, make sure if you want to take a sizable or forceful drag, that you swallow first, and never inhale if you feel like you need to cough. I've gagged a few times from that in particular. Other than that, just inhale. I'm not going to touch on MTL v.s. DL hits since others have done that pretty well. Oh, and the longer you hold it in, the more nicotine you get out of the hit. The quicker you let it go, the bigger cloud you get..... I think that covers it.